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<?php $a = "ab"; echo preg_replace("/(a)|(b)/", ["+$2+", "-$1-"], $a);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: preg_replace(): Argument #1 ($pattern) must be of type array when argument #2 ($replacement) is an array, string given in /in/dYqfv:5 Stack trace: #0 /in/dYqfv(5): preg_replace('/(a)|(b)/', Array, 'ab') #1 {main} thrown in /in/dYqfv on line 5
Process exited with code 255.

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